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Volume 35 Issue 2
Apr.  2016
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Article Navigation >  CARSOLOGICA SINICA  > 2016  >  35(2): 226-232
TAN Qiu-jin, QIN Zhen-shi, HUANG Xi-yun, ZHANG Hao, CHEN Hai-sheng, ZENG Fu-ping, WANG Wen-lin. Relationships between biomass of the Juglans regia trees in different stand ages and soil nutrients in karst peak-cluster depression[J]. CARSOLOGICA SINICA, 2016, 35(2): 226-232. doi: 10.11932/karst20160213
Citation: TAN Qiu-jin, QIN Zhen-shi, HUANG Xi-yun, ZHANG Hao, CHEN Hai-sheng, ZENG Fu-ping, WANG Wen-lin. Relationships between biomass of the Juglans regia trees in different stand ages and soil nutrients in karst peak-cluster depression[J]. CARSOLOGICA SINICA, 2016, 35(2): 226-232. doi: 10.11932/karst20160213
shu

Relationships between biomass of the Juglans regia trees in different stand ages and soil nutrients in karst peak-cluster depression

doi: 10.11932/karst20160213
  • 1.

    Guangxi Institute of Tropical Agricultural Science

  • 2.

    Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, CAS/Huanjiang Observation and Research Station of Karst Ecosystems, CAS

  • Publish Date: 2016-04-25
    Abstract
  • The objective of this study is to explore the change process and the relationships between biomass and soil nutrients for different-aged Juglans regia plantation in karst peak-cluster depression in the northwest of Guangxi Province. Based on a combination of field investigation and laboratory analysis, this study analyzed the change in biomass and soil nutriens and the influence of soil nutrients on the biomass of the Juglans regia trees in different stand ages. It also discussed the biomass of the Juglans regia trees and associated soil nutrients; and established relationship between soil nutrients and environmental factors (e.g. slope aspect, gradient and position and bare rock rate). The biomass of the Juglans regia trees increases along with the stand age, of which the trunk and root accounted for more than 60% of the total biomass. Except for the available potassium, the soil nutrients have such a trend as rich fruiting period (33 years) > seedling stage (2 years) > early fruiting (10 years). The result of correlation analysis showed that there was no significant relationship between soil nutrient, slope position and bare rock rate. However, there was negatively significant correlation between soil nutrient, slope, and vegetation coverage. The biomass of the Juglans regia trees is a result of the combined influence of various factors and their growth at different stages is affected by different factors. For example, in seedling period the biomass of the Juglans regia trees is controlled by total phosphorus; but that is controlled by available phosphorus in early fruiting and by available nitrogen in rich fruiting. Based on these findings, soil nutrient should be considered as one of key factors in the Juglans regi plantation cultivation in karst regions.

     

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